{
"manageEntity": {
"action": "Save",
"entityId": "646911868",
"entityType": "Track",
"nonce": "0x318c7bdc60e17c56909525f78cb13a622485be977a221b6da5a9c333d69a036f",
"signature": "0x3060a18db1c3945ad97c19beedb10b794bb82375d520dbac64c7f80402aa4bec388cacce3217bef631fd9a24a3c9460be9b955262137789e759e00f05aa2b7221c",
"signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
"userId": "714646433"
}
}